Professions whose rhythms are dictated by client demand, such as law or consultancy, would encounter sizeable roadblocks when implementing this in practice: clients paying the highest fees may expect access to their lawyer 24/7.
These professions also tend to be highly competitive and there will always be those willing to ignore a four-day mandate to get ahead.
A more viable solution might instead be found in bespoke flexibility. For example, we’ve found that associates are increasingly choosing to finish early on Fridays, but then work a few hours on Sundays. Different work patterns demand different work solutions.